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Medical Definition of Monoamine oxidase inhibitors
1. A chemically heterogeneous group of drugs that have in common the ability to block oxidative deamination of naturally occurring monoamines. Although mao inhibitors are probably as effective as tricyclic antidepressants in the treatment of major depression, the complex, sometimes severe, and often unpredictable interactions between mao inhibitors and many other drugs and food-derived amines make their medical use difficult and potentially hazardous. (12 Dec 1998)